/*+
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* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of the License "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description: +
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*+
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*/+
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+
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+
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#ifndef __KEYAGREEMENTIMPL_H__+
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#define __KEYAGREEMENTIMPL_H__+
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+
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/**+
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@file +
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@internalComponent+
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@released+
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*/+
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+
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#include <e32base.h>+
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#include <cryptospi/cryptospidef.h>+
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#include "keys.h"+
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#include "keyagreementplugin.h"+
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+
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/**+
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 * Abstract base class for key agreement plug-ins.+
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 */+
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namespace SoftwareCrypto+
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	{+
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	using namespace CryptoSpi;+
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	+
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	NONSHARABLE_CLASS(CKeyAgreementImpl) : public CBase, public MKeyAgreement+
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		{+
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	public:+
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		+
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		// Override MPlugin virtual functions+
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		void Close();+
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		void Reset(); // Always call reset in super-class if you override this+
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		TAny* GetExtension(TUid aExtensionId);+
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		void GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics);+
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		// End of MPlugin+
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+
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		// Override MKeyAgreement virtual functions+
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		void SetKeyL(const CKey& aSelfPrivateKey, const CCryptoParams* aParams);+
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		// End of MKeyAgreement+
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+
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		/// Destructor+
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		~CKeyAgreementImpl();+
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		+
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	protected:+
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		/**+
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		Constructor+
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		*/+
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		CKeyAgreementImpl();+
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			+
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		/**+
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		Second phase of construction. Always call ConstructL in the super-class+
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		if your override this method.+
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		@param aPrivateKey The private key of one of the parties+
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		@param aParams	The parameters shared between both parties+
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		*/+
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		virtual void ConstructL(const CKey& aPrivateKey, const CCryptoParams* aParams);+
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+
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		/**+
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		Helper function implemented by concrete cipher sub-class that allows+
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		GetCharacteristicsL to return the correct characteristics object.+
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		@return The implemention uid+
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		*/+
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		virtual TUid ImplementationUid() const = 0;+
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+
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	private:+
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+
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	protected:+
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		CKey* iPrivateKey;+
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		CCryptoParams* iSharedParams;	// common parameters between our private key and their public key+
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		};+
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	}+
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+
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#endif	//	__KEYAGREEMENTIMPL_H__+
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